Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629040
Renzhou Gui, Hao Liang, Juan Li, M. Tong
In this paper, we propose a new weighted L1 norm minimization algorithm, which requires a more relaxed constrained equidistant constant (RIC) boundary. The constrained L1 norm minimization can restore sparse solutions from a small number of linear observations, and the variable weight L1 norm minimizes It can effectively improve the mathematical performance of sparse solutions and produce a series of approximate solutions with strong convergence. Finally, this method is applied to the recovery of wavelet sparse matrix, and a good success rate and extremely low recovery error are obtained. It can be proved that the mathematical performance of the new algorithm proposed in this paper is better than other advanced methods in the field of compressed sensing.
{"title":"Sparse Wavelet Transform Based on Weight Vector Iteration with Minimum L1 Norm for Ground Penetrating Radar","authors":"Renzhou Gui, Hao Liang, Juan Li, M. Tong","doi":"10.1109/comcas52219.2021.9629040","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629040","url":null,"abstract":"In this paper, we propose a new weighted L1 norm minimization algorithm, which requires a more relaxed constrained equidistant constant (RIC) boundary. The constrained L1 norm minimization can restore sparse solutions from a small number of linear observations, and the variable weight L1 norm minimizes It can effectively improve the mathematical performance of sparse solutions and produce a series of approximate solutions with strong convergence. Finally, this method is applied to the recovery of wavelet sparse matrix, and a good success rate and extremely low recovery error are obtained. It can be proved that the mathematical performance of the new algorithm proposed in this paper is better than other advanced methods in the field of compressed sensing.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131537297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629028
Arkady Molev-Shteiman, Xiao-Feng Qi
We propose beam-time hopping modulation for automotive imaging radar that is immune to inter-car interference even in presence of analog frontend non-linear distortion. Other schemes such as direct sequence spread spectrum modulation or frequency hopping also mitigate inter-car interference due to orthogonality between radars signals. However non-linear distortion breaks this orthogonality. As a result, the requirements to radar analog frontend linearity are very strict which significantly increase cost and power consumption of automotive radar. In contrast, the beam-time hopping modulation maintains radars signals orthogonality to a large degree, even in the presence of non-linear distortion. It softens requirements on analog frontend linearity and may significantly reduce car radar cost and power consumption.
{"title":"Beam-Time Hopping modulation for automotive imaging radars interference mitigation","authors":"Arkady Molev-Shteiman, Xiao-Feng Qi","doi":"10.1109/comcas52219.2021.9629028","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629028","url":null,"abstract":"We propose beam-time hopping modulation for automotive imaging radar that is immune to inter-car interference even in presence of analog frontend non-linear distortion. Other schemes such as direct sequence spread spectrum modulation or frequency hopping also mitigate inter-car interference due to orthogonality between radars signals. However non-linear distortion breaks this orthogonality. As a result, the requirements to radar analog frontend linearity are very strict which significantly increase cost and power consumption of automotive radar. In contrast, the beam-time hopping modulation maintains radars signals orthogonality to a large degree, even in the presence of non-linear distortion. It softens requirements on analog frontend linearity and may significantly reduce car radar cost and power consumption.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131778919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629050
L. Tognolatti, P. Baccarelli, V. Jandieri, S. Ceccuzzi, C. Ponti, G. Schettini
This paper presents an overview of our analytical and numerical methods to design radiative structures based on photonic crystals by means of leaky-wave theory. In particular, we present several parametric studies to justify the choice of the design parameters. Based on these studies, we show how it is possible to design highly directive devices in which the radiation can be described by a properly excited dominant leaky mode. The proposed design procedure can be easily extended to a wide class of structures, leading to the construction of sensors and antennas with high radiation efficiency and directivity.
{"title":"Dielectric Photonic Crystal Slabs: Leaky-Wave Radiation from an Embedded 2-D Electric Line Source","authors":"L. Tognolatti, P. Baccarelli, V. Jandieri, S. Ceccuzzi, C. Ponti, G. Schettini","doi":"10.1109/comcas52219.2021.9629050","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629050","url":null,"abstract":"This paper presents an overview of our analytical and numerical methods to design radiative structures based on photonic crystals by means of leaky-wave theory. In particular, we present several parametric studies to justify the choice of the design parameters. Based on these studies, we show how it is possible to design highly directive devices in which the radiation can be described by a properly excited dominant leaky mode. The proposed design procedure can be easily extended to a wide class of structures, leading to the construction of sensors and antennas with high radiation efficiency and directivity.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133125744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629092
Aviel Glam, Maayan Hacohen, Barak Farbman
Routing algorithms in mobile ad-hoc networks (MANETs) avoid network flooding whenever possible as it is a very inefficient use of medium resources. While the main optimization goal in most cases is increased network efficiency by lowering the number of relays while reaching full coverage, one should strive to avoid congesting the relays as well otherwise network efficiency will decrease. In this paper, we propose a new efficient metric that captures topology traits - Node Cardinality (NC). We use this metric as a key feature for enhancing existing routing algorithms and suggest a new routing algorithm based on the NC metric to improve network efficiency via preemptively reducing the maximal usage of a relay. Thus avoiding congested relays that were otherwise bottlenecks inside the network. All proposed algorithms are compared with known table-driven algorithms using thorough simulations.
{"title":"Improved Load-Balancing Routing Algorithms in MANET Using Node Cardinality Metric","authors":"Aviel Glam, Maayan Hacohen, Barak Farbman","doi":"10.1109/comcas52219.2021.9629092","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629092","url":null,"abstract":"Routing algorithms in mobile ad-hoc networks (MANETs) avoid network flooding whenever possible as it is a very inefficient use of medium resources. While the main optimization goal in most cases is increased network efficiency by lowering the number of relays while reaching full coverage, one should strive to avoid congesting the relays as well otherwise network efficiency will decrease. In this paper, we propose a new efficient metric that captures topology traits - Node Cardinality (NC). We use this metric as a key feature for enhancing existing routing algorithms and suggest a new routing algorithm based on the NC metric to improve network efficiency via preemptively reducing the maximal usage of a relay. Thus avoiding congested relays that were otherwise bottlenecks inside the network. All proposed algorithms are compared with known table-driven algorithms using thorough simulations.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124494378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9628996
N. Verhovski, V. Vulfin, S. Sayfan-Altman, O. Yannay, R. Shavit
This paper describes the approach of focusing microwave energy inside a biological tissue for the cancer treatment. The main goal is to achieve the required temperature on the tumor tissue without destroying the healthy tissue as a result of the heating. The proposed method for focusing the electromagnetic energy is based on the reciprocity theorem, in order to define the proper excitations currents ensuring the required focused power at the tumor area. The different aspects of the design are considered and validated using the electromagnetic simulation tools. The proposed model is tested for various geometric structures and for a realistic human body model. Thermal simulations to capture the RF losses is necessary making sure the tissue is not damaged, to resolve the heating of the tissue a gel flued is attached around the ligament that acts as thermal cooler and a RF impedance matching impedance, these different cases are also included. The results show promising future for this type of cancer treatment.
{"title":"Phased Array Antenna Design for Hyperthermia Purpose","authors":"N. Verhovski, V. Vulfin, S. Sayfan-Altman, O. Yannay, R. Shavit","doi":"10.1109/comcas52219.2021.9628996","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9628996","url":null,"abstract":"This paper describes the approach of focusing microwave energy inside a biological tissue for the cancer treatment. The main goal is to achieve the required temperature on the tumor tissue without destroying the healthy tissue as a result of the heating. The proposed method for focusing the electromagnetic energy is based on the reciprocity theorem, in order to define the proper excitations currents ensuring the required focused power at the tumor area. The different aspects of the design are considered and validated using the electromagnetic simulation tools. The proposed model is tested for various geometric structures and for a realistic human body model. Thermal simulations to capture the RF losses is necessary making sure the tissue is not damaged, to resolve the heating of the tissue a gel flued is attached around the ligament that acts as thermal cooler and a RF impedance matching impedance, these different cases are also included. The results show promising future for this type of cancer treatment.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123488084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629012
E. Ngai, R. Shavit
a new and practical perspective on the management of Parkinson's disease (PD) is introduced due to the progress in the field of medical imaging techniques in the charting of the mid-brain activities of the PD patients. A new cost-effective design of comfortably weighed personal helmet (microwave head-band type) sensor is the timely equipment to evaluate Parkinson Disease patients at home to maintain good physician-patient safety during pandemic worldwide lockdown. These microwave helmet sensor devices function as handy "stethoscopes" designed for the PD medical staffs and patients. They are also very practical tool for the PD patients to check their physical conditions and alert them to perform suitable body exercise to reduce their PD symptoms [1].
{"title":"Versatile Low-Cost Microwave Helmet Brain Sensor for Monitoring Parkinson Disease","authors":"E. Ngai, R. Shavit","doi":"10.1109/comcas52219.2021.9629012","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629012","url":null,"abstract":"a new and practical perspective on the management of Parkinson's disease (PD) is introduced due to the progress in the field of medical imaging techniques in the charting of the mid-brain activities of the PD patients. A new cost-effective design of comfortably weighed personal helmet (microwave head-band type) sensor is the timely equipment to evaluate Parkinson Disease patients at home to maintain good physician-patient safety during pandemic worldwide lockdown. These microwave helmet sensor devices function as handy \"stethoscopes\" designed for the PD medical staffs and patients. They are also very practical tool for the PD patients to check their physical conditions and alert them to perform suitable body exercise to reduce their PD symptoms [1].","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"15 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120856836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629046
Ellie Langley, C. Fulton, M. Yeary
There is a growing need for more effective phased array calibration, both initial and in situ. Mutual coupling is a useful mechanism for gathering amplitude and phase information about transmit and receive chains forming the frontend and backend electronics behind each element. However, modeling and characterizing mutual coupling in large arrays with modern antenna elements is often complicated because of their complex geometry, nulls in coupling, edge effects, changes over time/temperature, and more. This paper details an investigation into how such array behavior can be roughly modeled using a simplified numerical electromagnetic framework that allows for larger arrays to be modeled to inform and help develop approximate mutual coupling calibration algorithms for arrays with element-level behavior.
{"title":"Analysis of Mutual Coupling Algorithms for a Dipole Array","authors":"Ellie Langley, C. Fulton, M. Yeary","doi":"10.1109/comcas52219.2021.9629046","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629046","url":null,"abstract":"There is a growing need for more effective phased array calibration, both initial and in situ. Mutual coupling is a useful mechanism for gathering amplitude and phase information about transmit and receive chains forming the frontend and backend electronics behind each element. However, modeling and characterizing mutual coupling in large arrays with modern antenna elements is often complicated because of their complex geometry, nulls in coupling, edge effects, changes over time/temperature, and more. This paper details an investigation into how such array behavior can be roughly modeled using a simplified numerical electromagnetic framework that allows for larger arrays to be modeled to inform and help develop approximate mutual coupling calibration algorithms for arrays with element-level behavior.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125887735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629053
A. Davidov, R. Shavit
A multibeam antenna (MBA) is defined as an antenna with the ability to generate simultaneously multiple independent beams from a single aperture and has an important role in wireless communication and radar systems. Multibeam antenna systems operating in the millimeter-wave frequency, have attracted a lot of research and have been actively investigated for fifth generation (5G) wireless communications applications. This paper describes the design process of a multibeam 2D lens antenna inspired by the Rotman lens design concept and based on a multilayer metasurface printed elements structure. The goal of this research is to design an MBA using a lens with printed elements to obtain a high gain and low side lobes in radiation pattern.
{"title":"Multibeam 2D Lens Antenna Based on Metasurface Technology","authors":"A. Davidov, R. Shavit","doi":"10.1109/comcas52219.2021.9629053","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629053","url":null,"abstract":"A multibeam antenna (MBA) is defined as an antenna with the ability to generate simultaneously multiple independent beams from a single aperture and has an important role in wireless communication and radar systems. Multibeam antenna systems operating in the millimeter-wave frequency, have attracted a lot of research and have been actively investigated for fifth generation (5G) wireless communications applications. This paper describes the design process of a multibeam 2D lens antenna inspired by the Rotman lens design concept and based on a multilayer metasurface printed elements structure. The goal of this research is to design an MBA using a lens with printed elements to obtain a high gain and low side lobes in radiation pattern.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130060517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629090
Run Levinger, J. Kadry, A. Bechtold
This work presents a divide-by-2 frequency divider designed using 22-nm CMOS Fully-Depleted Silicon on Insulator (FDSOI) technology. The circuit combines a dynamic load modulation, current reuse technique and back gate tuning to obtain a division range of 10 to 92 GHz with 0dBm input signal to the divider core (due to measurement limitations measured range is 20 to 60 GHz). The divider is suitable for all 5G bands, WiGiG, E-band radar and others and operates from a CMOS rail with no AC coupling required. The divider consumes less than 2 mW from 1V supply to obtain a figure-of-merit of more than 39 GHz/mW and occupies less than 65 um2 of silicon area.
{"title":"A 50 GHz 2 mW Inductor-Less Frequency Divider with Back-Gate Tuning Achieving a Locking Range of 160% in 22 FDSOI","authors":"Run Levinger, J. Kadry, A. Bechtold","doi":"10.1109/comcas52219.2021.9629090","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629090","url":null,"abstract":"This work presents a divide-by-2 frequency divider designed using 22-nm CMOS Fully-Depleted Silicon on Insulator (FDSOI) technology. The circuit combines a dynamic load modulation, current reuse technique and back gate tuning to obtain a division range of 10 to 92 GHz with 0dBm input signal to the divider core (due to measurement limitations measured range is 20 to 60 GHz). The divider is suitable for all 5G bands, WiGiG, E-band radar and others and operates from a CMOS rail with no AC coupling required. The divider consumes less than 2 mW from 1V supply to obtain a figure-of-merit of more than 39 GHz/mW and occupies less than 65 um2 of silicon area.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130596159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents a K-Band stepped FMCW radar chipset, operating in the frequency range of 17 GHz to 27 GHz, intended for realization of a large MIMO imaging array for the breast cancer detection application. Firstly, we discuss in detail the system considerations on how to overcome the extremely high losses of around 200 dB in the tissue. Secondly, we present a chipset comprising a transceiver and a signal generation chip realized in 130 nm BiCMOS technology. System partitioning is required to synchronize the system with one oscillator. The transceiver achieves a maximum output power of 5 dBm and a conversion gain of 25 dB at low power consumption of 30 mA from a single 1.5 V supply. It offers a high level of integration, while consuming only a small area of 2.58 mm2. The signal generation chip offers a phase noise of -98 dBc/Hz and occupies only 1.08 mm2.
{"title":"Chipset for K-Band Stepped FMCW MIMO RadarArray System for Breast Cancer Detection","authors":"Binde Fabian, Hollenbach Maximilian, Manokhin Gleb, Issakov Vadim","doi":"10.1109/comcas52219.2021.9629005","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629005","url":null,"abstract":"This paper presents a K-Band stepped FMCW radar chipset, operating in the frequency range of 17 GHz to 27 GHz, intended for realization of a large MIMO imaging array for the breast cancer detection application. Firstly, we discuss in detail the system considerations on how to overcome the extremely high losses of around 200 dB in the tissue. Secondly, we present a chipset comprising a transceiver and a signal generation chip realized in 130 nm BiCMOS technology. System partitioning is required to synchronize the system with one oscillator. The transceiver achieves a maximum output power of 5 dBm and a conversion gain of 25 dB at low power consumption of 30 mA from a single 1.5 V supply. It offers a high level of integration, while consuming only a small area of 2.58 mm2. The signal generation chip offers a phase noise of -98 dBc/Hz and occupies only 1.08 mm2.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129269608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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